I rented a cabana at GF last year, but I have to say I think the price depends on the number of people because they did ask how people would be there and the price I paid was more than the price I've seen floating around here on the boards. Anyhow, price aside, I enjoyed the canbana and would do it again for sure. They're close to the pool, so it can get very loud especially when they do the pool games and whatnot, so if that's an issue you may not enjoy it. Being super close to the edge of the pool was a good thing for me though because I use a wheelchair and I appreciated being close to a pool enterance and that someone's else in my party didn't have to go far to get my wheelchair when I was ready to get out.
I wished it had more than two loungers cause we were a party of all adults and it would have been nice to have a third or forth lounger for us all to sit out in the sun together but their really isn't enough space for that so we just took turns and some people were in the pool while others lounged. If it starts to rain they will allow you to sit inside the cabana unless the weather gets really bad (lightning) but if you have to leave because of bad weather you are refunded for a part of the day you lose. It's very nice to option to get out of the sun if you want, they do have a fridge stocked for you, sunscreen and lotions and stuff are there for your use, and the atendent will get you drinks/food (extra cost of course). Is it a necessary thing to have on your pool days, no.. but is it a nice luxury to splurge on, yes!